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Mod | | | Forums66 Topics128,055 Posts1,055,782 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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#47255 07/04/2005 6:22 PM | Joined: Oct 2003 Posts: 363 Member | | Member Joined: Oct 2003 Posts: 363 | Somewhere between 11 and 20 depending on your driving style.
The biggest boost to my mileage came from the addition of an HEI (follow Tony's instructions to build one out of a 250 big HEI for the cheapest way). | | |
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